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(1) that the product of the standard deviations ( = √(<ψ|A

^{2}|ψ>-<ψ|A|ψ>

^{2}), & ditto for B) ≥ 1

(2) that one cannot simultaneously diagonalize the matrix representations of A and B

(i.e., if A = U

^{†}CU and B = V

^{†}DV, for unitary U and V and diagonal C and D, with

^{†}denoting the adjoint, then U≠V.

Where is the link between these two?